參數(shù)資料
型號(hào)： ADV7189BKSTZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 10/104頁(yè)
文件大?。?/td> 0K
描述： IC DECODER VIDEO W/ADC 80LQFP
標(biāo)準(zhǔn)包裝： 1
類型： 視頻解碼器
應(yīng)用： 機(jī)頂盒，視頻播放器，錄音機(jī)
電壓 - 電源，模擬： 3.15 V ~ 3.45 V
電壓 - 電源，數(shù)字： 1.65 V ~ 2 V
安裝類型： 表面貼裝
封裝/外殼： 80-LQFP
供應(yīng)商設(shè)備封裝： 80-LQFP（14x14）
包裝： 托盤(pán)
產(chǎn)品目錄頁(yè)面： 788 (CN2011-ZH PDF)
ADV7189B
Rev. B | Page 13 of 104
ANALOG FRONT END
ANALOG INPUT MUXING
04983-0-006
AIN1
2
AIN7
AIN6
AIN2
AIN1
1
AIN8
AIN5
AIN3
AIN1
0
AIN9
AIN4
AIN9
AIN10
AIN3
AIN5
AIN8
AIN11
AIN2
AIN6
AIN7
AIN12
AIN1
AIN3
AIN9
AIN4
AIN10
AIN5
AIN11
AIN6
AIN12
AIN2
AIN8
AIN5
AIN11
AIN6
AIN12
1
0
1
0
1
0
ADC_SW_MAN_EN
INSEL[3:0]
ADC0_SW[3:0]
ADC1_SW[3:0]
ADC2_SW[3:0]
INTERNAL
MAPPING
FUNCTIONS
ADC2
ADC1
ADC0
Figure 6. Internal Pin Connections
The ADV7189B has an integrated analog muxing section that
allows more than one source of video signal to be connected to
the decoder.
139H
Figure 6 outlines the overall structure of the input
muxing provided in the ADV7189B.
As can be seen in
140H
Figure 6, there are two different ways in which
the analog input muxes can be controlled:
Control via functional registers (INSEL). Using INSEL[3:0]
simplifies the setup of the muxes, and minimizes crosstalk
between channels by pre-assigning the input channels.
This is referred to as ADI recommended input muxing.
Control via an I2C manual override (ADC_sw_man_en,
ADC0_sw, ADC1_sw, ADC2_sw). This is provided for
applications with special requirements, for example,
number/combinations of signals that would not be
served by the pre-assigned input connections. This is
referred to as manual input muxing.
Refer to
141H
Figure 7 for an overview of the two methods of
controlling the ADV7189B’s input muxing.
ADI Recommended Input Muxing
A maximum of 12 CVBS inputs can be connected and decoded
by the ADV7189B. As seen in
142H
Figure 5, this means the sources
have to be connected to adjacent pins on the IC. This calls for a
careful design of the PCB layout, for example, ground shielding
between all signals routed through tracks that are physically
close together.
INSEL[3:0] Input Selection, Address 0x00[3:0]
The INSEL bits allow the user to select an input channel as well
as the input format. Depending on the PCB connections, only
a subset of the INSEL modes are valid. The INSEL[3:0] does
not only switch the analog input muxing, it also configures the
standard definition processor core to process CVBS (Comp),
S-Video (Y/C), or component (YPbPr) format.
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ADV7189BKSTZ10F 制造商:AD 制造商全稱:Analog Devices 功能描述:Multiformat SDTV Video Decoder
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